initial right click support

Author: mbernasocchi

src/app/qgisapp.cpp

@@ -625,6 +625,11 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
   // request notification of FileOpen events (double clicking a file icon in Mac OS X Finder)
   QgsApplication::setFileOpenEventReceiver( this );
 
+#ifndef ANDROID2
+  //add reacting to long click in android
+  grabGesture(Qt::TapAndHoldGesture);
+#endif
+
   // update windows
   qApp->processEvents();
 
@@ -734,6 +739,12 @@ bool QgisApp::event( QEvent * event )
     openFile( foe->file() );
     done = true;
   }
+#ifndef ANDROID2
+  else if (event->type() == QEvent::Gesture )
+  {
+    done = gestureEvent(static_cast<QGestureEvent*>(event));
+  }
+#endif
   else
   {
     // pass other events to base class
@@ -7265,3 +7276,27 @@ QMenu* QgisApp::createPopupMenu()
 
   return menu;
 }
+
+#ifndef ANDROID2
+bool QgisApp::gestureEvent(QGestureEvent *event)
+{
+  if (QGesture *tapAndHold = event->gesture(Qt::TapAndHoldGesture))
+  {
+    tapAndHoldTriggered(static_cast<QTapAndHoldGesture *>(tapAndHold));
+  }
+  return true;
+}
+
+void QgisApp::tapAndHoldTriggered(QTapAndHoldGesture *gesture)
+{
+  if (gesture->state() == Qt::GestureFinished) {
+    QPoint pos = gesture->position().toPoint();
+    qDebug() << "tapAndHoldTriggered: LONG CLICK gesture happened at " << pos;
+    QWidget * receiver = QApplication::widgetAt( this->mapToGlobal(pos) );
+    qDebug() << "widget under point of click: " << receiver;
+
+    QApplication::postEvent( receiver, new QMouseEvent( QEvent::MouseButtonPress, pos, Qt::RightButton, Qt::RightButton, Qt::NoModifier ) );
+    QApplication::postEvent( receiver, new QMouseEvent( QEvent::MouseButtonRelease, pos, Qt::RightButton, Qt::RightButton, Qt::NoModifier ) );
+  }
+}
+#endif

src/app/qgisapp.h

@@ -83,6 +83,11 @@ class QgsScaleComboBox;
 #include <QPointer>
 #include <QSslError>
 
+#ifndef ANDROID2
+#include <QGestureEvent>
+#include <QTapAndHoldGesture>
+#endif
+
 #include "qgsconfig.h"
 #include "qgsfeature.h"
 #include "qgspoint.h"
@@ -1154,6 +1159,11 @@ class QgisApp : public QMainWindow, private Ui::MainWindow
     bool cmpByText( QAction* a, QAction* b );
 
     QString mOldScale;
+
+#ifndef ANDROID2
+    bool gestureEvent(QGestureEvent *event);
+    void tapAndHoldTriggered(QTapAndHoldGesture *gesture);
+#endif
 };
 
 #ifdef ANDROID